Foundry-flask



UNITED STATES PATENT OFFICE.

PETER B. MCGREGOR, OF IIILLBURN, NEV YORK.

FOUNDRY-FLASK.

SPECIFICATION forming part of Letters Patent No. 503,290, dated August15, 1893.

Application led March l1. 1893.

To MZ whom it may concern:

Be it known that I, PETER B. MCGREGOR, a citizep of the United States,residing at Hillburn, 1n the county of Rockland and State of New York,have invented certain new and useful Improvements in Foundry-Flasks, ofwhich the following is a specification.

My invention relates to that class of frames in which the meeting endsare separable f rom each other, and it consists of corner pieces soconstructed that they may be applied to said meeting ends so as toconnect them lirmly together or readily removed to permit the ends to beseparated.

My invention further consists in means for connecting the opposite sidesof the frame by an intermediate strip as fully set forth hereinafter andas illustrated in the accompanying drawings in which Figure l is a planin part section of a molding flask having separable sides and embodyingmy invention. Fig. 2 is a part longitudinal section on the line 2-2,Fig. l. Fig. 3 is a plan view showing the device as applied to a framewhich is open only at one corner. Fig. 4 is an edge view of the frame.Fig. 5 is an enlarged section showing the corner piece and itsapplication to the corner of the frame. Fig. 6 is a section on the line6-6, Fig. 5. Fig. Z is a perspective view of the corner piece, and Fig.Sis an enlarged sectional view of the socket piece.

The frameAhas four sides a, a' a2, a3 which may be separate from eachother as shown in Figs. l and 2, or they maybe all bent up of a singlepiece, as shown in Fig. 3. At each corner, when the frame is made offour pieces or at the single corner, when the frame is made of a singlepiece as shown in Fig. 3, the meeting ends are beveled at angles offorty-five degrees so that they can be brought close together, and theyare there secured by means of the clamping device B. This device Bconsists of a corner piece composed of two plates 5, 5, at right anglesto each other and adapted to t against the meeting sides of the frame,with lugs 6, 6 (one, two or more as may be required) extending betweenthe plates 5, 5, and in the end of each of the meeting sides of theframe is ont one, two or more recesses n, the recess in one side piecebeing in line with that of the other, and both. so arranged as to re-Serial No. 465,593. (No model.)

ceive one of the lugs 6, which, when the corner piece is applied to thecorner of the frame as shown in the drawings, extends inward beyond theinner line of the frame and in said lng is a recess adapted to receive akey C. The key is straight, or tapering, or as best shown in Fig. 6 mayconsist of two pieces S, 9 with beveled meeting ends so that when one isdriven down onto the other, this action will tend to bind the key firmlyin place and draw the corner piece close to the corner of the frame andbind the parts together.

Under some circumstances, the corners of the frame might be held by thefriction between the key and the face of the side piece, but in otherinstances, this would not be sufticient and I, therefore, provide eachplate with one or more lugs, 7 adapted to enter a recess in thecorresponding face of the side piece, so that when the corner piece isapplied as shown in Fig. 5, the key C will hold the corner piece closeupon the meeting corner of the frame, While the lugs '7 Will preventeither side piece from being drawn longitudinally away from the piece.By this eonstruction, I am enabled to bind the side pieces of a frame asfirmly together as if they were riveted, and at the same time, when itis necessary to knock down or break up the frame, the withdrawal of thekeys will be snicient to disconnect all parts from'each other.

In many instances, it is desirable to apply handles to the corners ofthe iiask, and to this end I provide each ot' the corner pieces B with alug 10 having a recess v/ adapted to receive a movable bar or handle X,or the bar Orhandle maybe securely fastened to the corner piece. Ineither case, the removal of the corner piece also removes the handle sothat the side pieces of the frame may be compactly stowed together.

It is sometimes desirable especially in the cope of a molding flask, tosubdivide the frame with one or more central pieces or strips D. To thisend, I provide the said strips with a dove-tailed projection 13 at eachend, and I secure to the inner face of each of the side pieces maasocket piece E, consisting of a plate of metal of a Ll-shape, the inneredges being beveled to fit the dove-tailed projection 13 of the strip D.The socket piece E may be bent np from a single strip or it may be asolid piece with a bevel edged socket u as shown in Fig. 8. In eithercase, it is riveted to the inside of one of the sides ot' the frame.

While I have referredr to the frame as being the frame of a moldingfiask, it may be the frame of any material intended for any purpose,wherever it is necessary to connect the corners of the frame together bydevices adapted to be removed and replaced.

Without limiting myself to the precise construction and arrangement ofparts shown, I claim as my invention- 1. The combination with themeeting sides of a frame having corresponding recesses e of a cornerpiece having two plates at right angles to each other,'and lugsextending bei tween the plates and recessed to receive a key,substantially as set forth.

2. The combinationwith the separable sides of a frame having each one ormore notches in the end, of a corner piece consisting of two plates atright angles to each other with one or more lugs extending between theplates, and having recesses to receivea key, and projections 7 on theinner faces of the corner piece, substantially as and for the purposeset forth.

3. The combination with the meeting sides of a frame having each one ormore recesses, of a corner piece having two plates at right angles toeach other, with one or more lugs between them recessed to receive akey, and a key consisting of two sections 8, 9 with beveled meetingends, substantially as set forth.

4. The combination with the meeting sides of a frame having notches orrecesses, of a corner piece consisting of plates at right angles to eachother, with lugs adapted to the openings formed by the recesses, thesaid corner pieces having handles connected therewith, and keys forsecuring the corner pieces,

substantially as set forth.

5. The combination of themeeting sides of a frame having notches, andcorner pieces having lugs and openings to receive keys, and socketedprojections to receive handles, substantially as set forth.

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing witnesses.

PETER B. MOGREGOR [L. s l

Witnesses:

GEORGE W. CONKLIN,

W. STUART Ron.

